Compilare: main.cpp: In function 'std::vector<int> getNodePositions(const std::vector<int>&, int)': main.cpp:21:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(auto i=0; i < outNodes.size(); ++i) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'std::vector<std::vector<int> > createSparseTable(const std::vector<int>&)': main.cpp:46:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(auto i=0; i < levels.size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp:51:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(auto i=1; i < levels.size(); i<<=1 ) ~~^~~~~~~~~~~~~~~